Test Generation on Model with C Caller Block

Open Script

This example shows how to use test generation on a model with a C Caller block and custom C code

Open the Model Containing the C Caller Block and Custom Code

open_system('sldvexCCallerBlock');

Generate Tests to Ensure Coverage of the Model

Use the sldvrun function to run Simulink® Design Verifier™ analysis.

opts = sldvoptions;
opts.Mode = 'TestGeneration';
opts.ModelCoverageObjectives = 'ConditionDecision';
opts.SaveHarnessModel = 'off';
opts.SaveReport = 'off';

[status, fileNames] = sldvrun('sldvexCCallerBlock', opts);

25-Jan-2026 04:49:06
Checking compatibility for test generation: model 'sldvexCCallerBlock'
Compiling model...done
Building model representation...done

25-Jan-2026 04:49:21

'sldvexCCallerBlock' is compatible for test generation with Simulink Design Verifier.
Generating tests...

..........
25-Jan-2026 04:49:29

Completed normally.

Generating output files:

25-Jan-2026 04:49:30
Results generation completed.

    Data file:
    /tmp/Bdoc26a_3146167_2121165/tpfd5df77b/sldv-ex07804984/sldv_output/sldvexCCallerBlock/sldvexCCallerBlock_sldvdata.mat

Verify the Coverage

Use the sldvruntest function to verify that the test suite achieves complete model coverage.

[~, finalCov] = sldvruntest('sldvexCCallerBlock', fileNames.DataFile, [], true);
cvhtml('Final Coverage', finalCov);

Clean Up

To complete the example, close all models.

close_system('sldvexCCallerBlock', 0);